Attachment for sewing-machines.



Patented Aug. 27, 1918.

BY (0W A A TTORNEY INVENTOR.

HARRY MENDELSOHN, OF NEW YORK, N Y.

2 ATTACHMENT FOR snwrneaaonrnns.

Specification of Letters Patent.

Patented A11 7. 27,1918.

Application filed. November 3, 1916. Serial No. 129,323.

To all whom it may concern:

Be it known that I, HARRY MENDELSOHN, a subject of the Czar of Russia, residing at New York city, New York, have invented certain new and useful Improvements in Attachments forSewihg-litlachines, of which the following is a specification. I

My invention relates to an attachment to sewing machines whereby I am enabled to make tucks and plaits, and sew the same by what are termed French knots.

So far as I am aware, in making plaits and tucks it has heretofore been necessary to first fold the material to form the plait or tuck, then to iron it down'and finally to run it through the machine to complete the operation. v i

The object of my invention isto provide a machiue attachment whereby it is simply necessary to feed the goods to the machine and the attachment willform a tuck or plait of the desired shape and width, and the ma chine will sew the same.

Stated briefly the lnventlon comprises a gage over which the material is passed to make the initial fold therein, in comblnation.

with tucking fingers or arms which complete the fold, and a presser foot under which the folded material passes in the course of the sewing operation. Y

One form of the invention is illustrated in the accompanying drawing, in which Figure 1 is a top plan view'of the invention, certain parts appearing in Figs. 2 and 3 being omitted from Fig. 1;

Fig. 2 is a longitudinal vertical sectional view thereof;

Fig. 3 is a transverse section;

Fig. 1 is a plan view of a fragment of material showing box plaits sewed in position by means of French knots;

Fig. 5 is similar view illustrating a piece of material provided with tucks,

Fig. 6 is a transverse sectional view of the material of Fig. 4; and

Fig. 7 is a similar vie Fig. 5.

The invention is applicable to any sewing machine, but I have found it to be best adapted for use on a Singer machine with which French knots may be sewed.

In the drawing, 10 denotes a casting on the bed of the machine and 11 denotes the machine arm.

Suitably supported by the casting 10 over the machine bed is the presser foot 12 which j of the material of is arch shape in cross section and at its forward end is provided with the needle opening 13. The needle is designated 14, and is removably held in the needle bar 15 as is usual in sewing machines, Secured to the machine bed beneath the forward endof the presser foot s a gage plate 16 having an opening 17 therein throughwhichthe needle 14: may pass. At the forward end of the gage plate I provide a removable gage 18 which determines the width of'the tuck or plait to be sewed. This gage comprises a shank 19 and a plate 20 extending at right angles to and supported on the top ofthe shank 19. The gage is substantially oblong in shape, although it will be understoodthatthe shape may be varied as desired. 21 denotes a screw or the-like by means ofwhich the gage is removably attached to the gage plate. 5

V Pivotally held in the casting 10 by means of a screw or stud 21 is a pairof'tucking arms 22 which extend from the casting 10 to a position under the plate 20 of the gage. As willbe noted from Fig. 1 the tucking arms converge at their forward ends and are adapted to lie at opposite sides of the shank means of which the bracket isheld to the casting 10. This bracket is also secured to the machine arm 11 by means of clamping bars 29.

Projecting upwardly from the. tucking arms 22 are arms 30 carrying at their upper ends rollers 31 normally lyinginjcontact with the rollers 25 at the ends of the arms 26. Held by the rear flange 27 of the bracket 27 is a curved spring 32 which acts against the presser foot 12 and holds it in yielding engagement with the gage plate 16. The forward end of the spring 32 is inserted in a clip 83 carried by the presser foot.

Secured to the presser foot in front of the wedge 24 is a yoke 34 which is somewhat like an inverted U in shape with the legs of the U extended laterally to form plates 35 extending parallel to and under the tucking arms 22. These plates 35 are provided with orifices 36 and the tucking arms 22 are each provided with an orifice 37, the latter orifices being adapted to aline with those in the plates of the yoke.

Secured to the presser foot 12 somewhat back of the needle opening therein is a hook 38 by means of which the presser foot may be raised.

The operation of the device will be understood from the following description thereof :-Assuming that it is desired to make a box plait such as that shown in Figs. 4 and 6, the proper width of gage is chosen and the same is then secured to the gage plate 16. The material is placed over the transverse plate 20 and the machine started in operation whereby the material will be automatically fed forward under the needle 14. The converging ends of the tucking arms 22 will hold the goods in proper position to form the box plait and the plait will be sewed by the needle 14 to form the French knots 39, as indicated in Fig. 6. If for any reason it is desired to move the goods, the hook 38 is raised whereby the presser foot is elevated, thus also raising the wedge 24, spreading the arms 26 and consequently the arms 30 and thereby removing the converging ends of the tucking arms from engagement with the gage. hen the sewing is to be continued, the presser foot is allowed to descend and the spring 23 will automatically draw the tucking arms to operative position. i

If it be desired to make a tuck, such as that shown in Fig. 5, and which is distinguished from the plait of Fig. 4: by being folded only at one side of the line of stitches, one of the tucking arms 22 is moved about its pivot away from the gage 19, 20, and then a pin or stud inserted through the openings 36 and 37 to hold such tucking arm in inoperative position. Then, when the material -X is passed through the machine but one fold will be made in the goods, thus producing the tuck Y of Fig. 7'. Obviously both tucking arms may be rendered inoperative by passing studs or pins through the orifices 37 in both arms 22, into the appropriate orifices 36 in plates 35.

It will be readily apparent thatby making the gage removable it is a simple matter to obtain the size of plait or tuck desired by attaching to the gage plate 16 different sized gages, that is gages in which the horizontal plate 20 is of a width to produce the desired width of the fold to the tuck or plait.

What I claim is 1. In a device of the character described, the combination of a presser foot, a gage plate below the forward end thereof, a gage removably attached to said gage plate in advance of the presser foot, a pair of pivotally supported tucking arms having their forward ends converging at opposite sides of. said gage plate, upwardly projecting arms carried by said tucking arms, and a wedge projecting upwardly from said presser foot between said last named arms whereby the upward movement of said presser foot will separate said tucking arms.

2. In a device of the character described, the combination of a presser foot, a gage plate under the forward end thereof, a gage removably secured to said gage plate in advance of said presser foot, a pair of tucking arms having their forward ends converging at opposite sides of said gage and their rear ends pivoted, upwardly projecting arms carried by said. tucking arms, pendent arms having rollers at the ends thereof, a wedge projecting upwardly from said presser feet between the ends of said pendent arms, and rollers on said upwardly projecting arms in engagement with the rollers on the pendent arms whereby upward movement of the presser foot will cause separation of the converging ends of said tucker arms.

3. A sewing machine attachment, comprising a presser foot, a gage in advance of said presser foot, movable tucking arms at opposite sides of said presser foot and having ends converging at opposite sides of said gage, and a perforated yoke supported by said presser foot adjacent said tucking arms, there being perforations in said tucking arms whereby means may be passed through the perforations in either of said tucking arms and said yoke to hold either of said tucking arms out of engagement with said gage.

In testimony whereof I have afiixed my signature in presence of two witnesses.

HARRY MENDELSOHN.

Witnesses OTTO BUNNEL, CLARICE FRANCK.

Copies of this patent may be obtained. for five cents each, by addressing the Commissioner of Patents, Washington, I). C. 

